SPECIFICATION FOR ROAD WORKS - TII Publications

1 Volume 1 Series 500 NRA SPECIFICATION for road WORKS Drainage & Service Ducts October 2009 1 National Roads Authority Manual of Contract Documents for road WORKS (NRA MCDRW) ERRATUM No. 1 (October 2009) to NRA SPECIFICATION for road WORKS Series 500 Drainage & Service Ducts Dated January 2009 The NRA SPECIFICATION for road WORKS (NRA MCDRW), Series 500 Drainage & Service Ducts, dated January 2009 is amended as follows:- 1. Page 5, Table 5/3 Replace 6/10 with 6/14 and replace 2/1 with 2/10 . 2. Page 5, Clause (v) Delete 10% fines value ..soaked conditions and replace with resistance to fragmentation in Category LA50 in accordance with IS EN 13242 . 3. Page 7, Clause (i) Delete For type B and C . 4. Page 8, Clauses to Delete Type C and replace with Type A in all cases (3 no.)

2 5. Page 9, Table 5/5 Delete Table 5/5 dated January 2009 and replace with Table 5/5 overleaf. 6. Page 11, Clause (ii) Delete IS EN ISO/IEC 17021 and replace with IS EN ISO/IEC 17025 7. Page 12, Clause Delete Sub-clause 8. Page 12, Clause Insert the following text at the end of the clause: Covers and gratings located within the carriageway, hardshoulder or hardstrip shall be set in a mortar with the following properties: (i) The material shall be non-shrink; (ii) The material shall have a minimum workable life of 15 minutes; (iii) The compressive strength of the material shall exceed 30N/mm2 in 3 hours; (iv) The tensile strength of the material shall exceed 5N/mm2 in 3 hours; Volume 1 Series 500 NRA SPECIFICATION for road WORKS Drainage & Service Ducts October 2009 2 9. Page 15, Clause 512 Delete 75 micron BS sieve and replace with 63 micron sieve.

3 10. Page 16, Clause Delete Unless otherwise described in Appendix 5/1 . 11. Page 17, Clause (ii) Delete Table 5/7 and replace with Table 5/8 . 12. Page 17, Table 5/7 Re-title table as Table 5/8 . 13. Page 20, Clause (vi) Delete Table 5/7 replace with Table 5/8 . 14. Page 20, Clause (a) Delete Table 5/7 and replace with Table 5/8 . 15. Page 21, Clause Delete Table 5/8 and replace with Table 5/9 . 16. Page 21, Table 5/8 Re-title table as Table 5/9 . 17. This Erratum shall be implemented forthwith. 18. All technical enquiries or comments on this Erratum or the NRA Series 500 should be sent in writing to: Specifications Section National Roads Authority St. Martins House Waterloo road Dublin 4 Instructions For Use The following version of the Manual of Contract Documents for road WORKS (NRAMCDRW) incorporates the above changes.

4 Volume 1 Series 500 NRA SPECIFICATION for road WORKS Drainage & Service Ducts October 2009 3 Table 5/5: Grading and geometrical requirements for filter drain material. Type A Type B Standard IS EN 13242 IS EN 13242 Size, mm 20/40 20/40 Grading and oversize categories GC 80-20 GC 80-20 Oversize category - - Category for tolerances at mid-size sieves GTNR (no requirement) GTNR (no requirement) Category for maximum fines fNR (no requirement) fNR (no requirement) Category for Crushed or Broken Particles and Totally Rounded Particles C90/3 CNR Flakiness Index, FI FI50 FINR (no requirement) Summary grading requirements Sieve size, mm Percentage by mass passing 80 63 40 20 10 100 98-100 80-99 0-20 0-5 100 98-100 80-99 0-20 0-5 Volume 1 Series 500 NRA SPECIFICATION for road WORKS Drainage & Service Ducts January 2009 DRAINAGE AND SERVICE DUCTS Contents Clause Title Page 501 Pipes for Drainage and for Service Ducts.

5 1 502 Excavation for Pipes and Chambers .. 4 503 Bedding, Laying and Surrounding of Pipes .. 4 504 Jointing of Pipes .. 6 505 Backfilling of Trenches and Filter Drains .. 7 506 Connecting to Existing Sewers, Drains, Chambers and Channels .. 10 507 Chambers .. 10 508 Gullies and Pipe Junctions .. 12 509 Testing and Cleaning .. 13 510 Surface Water Channels and Drainage Channel Blocks .. 14 511 Land Drains .. 15 512 Backfilling to Pipe Bays and Verges on Bridges .. 15 513 Permeable Backing to Earth Retaining Structures .. 16 514 Fin Drains .. 16 515 Narrow Filter Drains .. 21 516 Combined Drainage and Kerb Systems .. 22 517 Linear Drainage Channel Systems .. 23 518 Thermoplastics Structured Wall Pipes and Fittings .. 24 519 Geotextiles for Filter Drains .. 30 520 Attenuation .. 31 Volume 1 Series 500 NRA SPECIFICATION for road WORKS Drainage & Service Ducts January 2009 1 Drainage and Service Ducts 501 Pipes for Drainage and for Service Ducts General 1 Where the term drain is used in this Series it shall be deemed to include the terms sewer and piped culvert up to 2000mm internal diameter.

6 Box culverts shall be as described in Appendix 5/1. The Contractor shall design the box or piped culverts listed in Appendix 1/10 in accordance with the requirements of the 100 Series for the Design of Permanent WORKS by the Contractor. 2 Drains, excluding those constructed using corrugated steel pipes exceeding 900 mm diameter, shall comply with this Series and any additional requirements described in Appendix 5/1. Drains constructed using corrugated steel pipes exceeding 900 mm diameter shall comply with the 2500 Series. Unless otherwise described in Appendix 5/1, only one type of pipe shall be used within any individual drain or service duct between consecutive chambers. The Contractor shall ensure that plastic pipes are not subject to deterioration due to sunlight during the period between manufacture and installation in the ground.

7 Pipes for Drainage 3 Pipes for drainage shall be selected from the alternatives in Table 5/1 and shall comply with the standards and particular requirements therein. The Contractor shall show that the pipes he selects have hydraulic flow capacity equal to that adopted in the hydraulic design of the system as described in Appendix 5/1. Pipes and fittings other than those included in Table 5/1 shall be permitted provided that they hold a current Irish Agr ment Board Roads and Bridges Certificate (or equivalent) stating that they are a suitable alternative for the usage specified in Table 5/1. On completion of the whole of the drainage WORKS , the Contractor shall provide the Employer's Representative with a schedule showing details of all pipe types used, including quality, joints and name of manufacturer.

8 Corrugated Steel Pipes Not Exceeding 900mm Diameter 4 Corrugated steel pipes shall be manufactured from either: (i) bolted segmental plate pipes complying with sub-Clause 6 of this Clause and having plate thicknesses as described in Appendix 5/1; or (ii) galvanized steel sheet suitable for lock seam fabrication complying with IS EN 10327 grade DX51D + Z600, or aluminium coated steel sheet complying with AASHTO SPECIFICATION M274-87I (2004). Corrugated steel pipes complying with (ii) above shall be manufactured from steel of minimum thickness mm unless otherwise described in Appendix 5/1. 5 Where described in Appendix 5/1 corrugated steel pipes not exceeding 900 mm diameter shall be provided with additional protection of hot applied bitumen complying with AASHTO SPECIFICATION M190-95(2000), or an approved equivalent coating system.

9 6 Bolted segmental plate pipes shall meet the following requirements: (i) Steel for the plates shall comply with BS 1449: Part , Grade 3 or Grade 4, Condition HR. (ii) After forming, the depth of the corrugations shall be within a tolerance of 6% and the pitch of the corrugations within a tolerance of 4% of the nominal dimensions. Plates shall have a minimum lip of 45 mm beyond each end crest. Cut edges shall be free from notches, gouges, rust or burrs. (iii) Bolts and nuts for connecting plates shall comply with IS EN ISO 4014, IS EN 4017 and IS EN ISO 4032, for IS EN ISO 898-1 and IS EN 20898-2, property class , nominal size M20, or with BS 4395: Part 2, nominal size M20, or with IS EN ISO Volume 1 Series 500 NRA SPECIFICATION for road WORKS Drainage & Service Ducts January 2009 2 8 9 8 -1 and IS EN 20898-2, property class 10.

10 9. (iv) When all the plates have been assembled, the nuts shall be tightened against a domed washer. The tightening shall be repeated if necessary to achieve the torque recommended by the manufacturer. (v) Steel plate shall be galvanized in compliance with the requirements of the 1900 Series. Plates shall be galvanized after forming the corrugations and completing all necessary cutting, punching and drilling. Units in which the zinc coating has been burned by welding or otherwise damaged in fabrication, transport or handling at Site shall be made good in compliance with the requirements of the 1900 Series. Bolts and nuts shall also be galvanized in compliance with the requirements of the 1900 Series.